Improvement in lamps



(90. EMI-L BoEscH.

Witnesses Lamp. u

'PatentedDec..26,1871.

I nventor UNITED STATES EMIL BOESCH, OF` SAN FRANCISCO, CALIFORNIA.`

-IMPROVEMENT IN LAMPS.

Specification forming part of Letters Patent No. 122,217, dated December 26,1871.

SPECIFICATION.

To all 'whom 'it may concern:

Be it known that I, EMIL BOESCH, of city and county of San Francisco, State ofCalifornia, have invented an Improved Safety-Lamp and Burner; and I do hereby declare the following description and accompanying drawings are suiiicient to enable any person skilled in the art or science to which it most nea-rly appertains to make and use my said invention or improvements without fur ther invention or experiment.

Myimprovement in burners relates to th at class of Argand burner in which the dame is regulated by turning the outer case of the burner; and it consists in a novel arrangement for regulating the flame by turning this case without raising or lowering the chimney. The lamp is provided with one or more ducts or passages, one of which may be used for conveying the gas which may be formed in the oil-holder to the central tube which feeds air to the flame, so that the gas and air will bemingled previous to their coming in contact with the flame, while the other can be used in the same manner, or simply to convey away the vapor from the oil-vessel and disperse it into a protecting air-chamber.

In order to more fully illustrate and explain my invention, reference is had to the accompanying drawing forming a part of this specification, in which- Figure l is a side elevation. Fig. 2 is a seci-` tional view. Fig. 3 is a bottom view. Fig. 4 is a top view.

A represents the body or oil-'vessel of the lampL Passing up through the center of this vessel is the tube b, which supplies air to the ilame. This tube extcndsdown through the bottom of the vessel and a short distance below it, as shown. Just below the vessel perforations c are made in the tube, through which air can pass into it from the chamber e', which is formed by the cap d around the tube on the under side ofthe vessel. Air is admitted into this chamber through perforations in the cap, thus avoiding too strong a draught by obstructing the passage of the air into. the chamber and tube. The upper end ofthe tube b is channeled from the inside of the vessel to near the upper end of the tube, as shown at e, where an opening is made'into the tube. This channel or duct serves to conveyT any gas which may be formed in the vessel into the tube b, where it is Voutside so as to form a handle to the lamp.

mixed with the air previous to its coming in contact with the iiame, thus avoiding the danger of explosion. In some lamps, where the central air-l tube is not used, another safety-tube, f, may be employed. This tube rises from the vessel at one side and is bent upon itself, as shown, so a-s to pass back either into and through the vessel and into the chamber at the bottom, or it may pass This tube also serves to convey any gas which may form from the vessel to the chamber c', where it will be dispersed through the perforations inthe chamber into the air in such a diluted state as to be uninflammable. Either one or both of these lastdescribed devices may be employed on any one lamp, according to its construction. These tubes serve to keep the oil-vessel free from gas by conveying it away as fast as it is formed, thus entirely avoiding'the danger of explosion from this cause. My burner consists of a solid outer tube, g, and an inner tube, h, the latter bein gof a proper size to slip down over the air-tube b and form a continuation of it, and by covering the tube b forms' a perfect duct of the channel e, through which the gas passes to the interior of the airtube. The tube gis somewhat larger at the bottom than at the top, and the two tubes are united together by a single rib, i, upon one side, as shown at Fig. 4, thus permitting the use of a single flat wick of theproper width. The tube gbeing largest` at the bottom will allow the wick when inserted to form a complete circular wick at the upper end.

In theordinary Argand burner the outer case K screws down upon the tube g, and the ame of the wick is regulated by turning the case up or down as required to expose more or less of the wick. This case also supports the chimney, which is also moved up and down with it. Owing to the peculiar shape of the chimneys employed on thisclass of burners it will be readily seen that as the case is screwed down to increase the size of the dam e the narrow portion ofthe chimney is brought down nearer to the flame, thus increasing the lia bility of breaking the chimney, kbesides causing the dame to be inferior in quality. In my burner the case K simply rests down upon the flange l.

A thimble or ring, m, passes down over the upper end of the tube g, and is provided with screwthreads so as to screw down into the upper end of the case K.l This ring is slotted upon one side,

,and a projection, n, on .the tube g, enters the slot so asto preventv'tli'e thimble-from turning.; thus when Vthe case K is turned the thimble will beraisedV or lowered by the screw, so'as to regulate the ilame Without altering the position of either the case or chimney.

By this method oi'. constructing lamps I render them simple, safe, and convenient', while my im- 4provelnents in the burner render, also7 it perfectly safe and increases the quality of the light. By constructing the tube g Without openings4 or slots in its sides I avoid the danger of iiring the wick inside ofthe burner, a result liable to happen at any time'whelr`slots` are used', as in some of the burners of this class. if

Having` thus described my invention, what I claimfand desire to' secure by letters Patent, 1s

and seal.

In Witness that the above-described invention I is claimed by me I have lhereunto set my hand Y Y EMIL BOESGH. [L.s.] Witnesses: v

GEO. H. STRONG,

WM. GERLACH. (90) 

